Efficacy of rivastigmine in dementia with Lewy bodies: A randomised, double-blind, placebo-controlled international study

Ian McKeith, Teodoro Del Ser, PierFranco Spano, Murat Emre, Keith Wesnes, Ravi Anand, Ana Cicin-Sain, Roberto Ferrara, René Spiegel

Research output: Contribution to journalArticlepeer-review

Abstract

Background: Dementia with Lewy bodies is a common form of dementia in the elderly, characterised clinically by fluctuating cognitive impairment, attention deficits, visual hallucinations, parkinsonism, and other neuropsychiatric features. Neuroleptic medication can provoke severe sensitivity reactions in patients with dementia of this type. Many deficits in cholinergic neurotransmission are seen in the brain of patients with Lewy-body dementia; therefore, drugs enhancing central cholinergic function represent a rationally-based therapeutic approach to this disorder. Rivastigmine, a cholinesterase inhibitor, was tested in a group of clinically characterised patients with Lewy-body dementia. Methods: A placebo-controlled, double-blind, multicentre study was done in 120 patients with Lewy-body dementia from the UK, Spain, and Italy. Individuals were given up to 12 mg rivastigmine daily or placebo for 20 weeks, followed by 3 weeks rest. Assessment by means of the neuropsychiatric inventory was made at baseline, and again at weeks 12, 20, and 23. A computerised cognitive assessment system and neuropsychological tests were also used, and patients underwent close medical and laboratory safety analysis. Findings: Patients taking rivastigmine were significantly less apathetic and anxious, and had fewer delusions and hallucinations while on treatment than controls. Almost twice as many patients on rivastigmine (37, 63%), than on placebo (18, 30%), showed at least a 30% improvement from baseline. In the computerised cognitive assessment system and the neuropsychological tests, patients were significantly faster and better than those on placebo, particularly on tasks with a substantial attentional component. Both predefined primary efficacy measures differed significantly between rivastigmine and placebo. After drug discontinuation differences between rivastigmine and placebo tended to disappear. Known adverse events of cholinesterase inhibitors (nausea, vomiting, anorexia) were seen more frequently with rivastigmine than with placebo, but safety and tolerability of the drug in these mostly multimorbid patients were judged acceptable. Interpretation: Rivastigmine 6-12 mg daily produces statistically and clinically significant behavioural effects in patients with Lewy-body dementia, and seems safe and well tolerated if titrated individually.

Original languageEnglish
Pages (from-to)2031-2036
Number of pages6
JournalLancet
Volume356
Issue number9247
DOIs
Publication statusPublished - Dec 16 2000

ASJC Scopus subject areas

  • Medicine(all)

Fingerprint

Dive into the research topics of 'Efficacy of rivastigmine in dementia with Lewy bodies: A randomised, double-blind, placebo-controlled international study'. Together they form a unique fingerprint.

Cite this